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Ajo Peak to Tinajas Altas: a Flora of Southwestern Arizona: Part 2

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Felger, R.S., S. Rutman, J. Malusa, and T.R. Van Devender. 2013. Ajo Peak to Tinajas Altas: A flora of southwestern Arizona: Part 2. The checklist. Phytoneuron 2013-27: 1–30. Published 9 April 2013. ISSN 2153 733X AJO PEAK TO TINAJAS ALTAS: A FLORA OF SOUTHWESTERN ARIZONA PART 2. THE CHECKLIST RICHARD STEPHEN FELGER Herbarium, University of Arizona Tucson, Arizona 85721 [email protected] & Sky Island Alliance P.O. Box 41165 Tucson, Arizona 85717 *author for correspondence SUSAN RUTMAN 90 West 10th Street Ajo, Arizona 85321 JIM MALUSA School of Natural Resources and the Environment University of Arizona Tucson, Arizona 85721 [email protected] THOMAS R. VAN DEVENDER Sky Island Alliance P.O. Box 41165 Tucson, Arizona 85717 [email protected] & Herbarium, University of Arizona Tucson, Arizona 85721 ABSTRACT A checklist is provided for the modern and fossil vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in southwestern Arizona. The modern flora includes 741 native and non-native taxa. The fossil record includes more than 219 species documented by specimens recovered from packrat ( Neotoma spp.) middens spanning the last 43,000+ years. An additional checklist is provided for the approximately 135 taxa restricted to higher-elevation mountains in Organ Pipe Cactus NM. This article is the second contribution for our flora of southwestern Arizona. KEY WORDS : Sonoran Desert, vascular plant flora, Arizona, Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, Tinajas Altas, deep history, non-native species, desert sky islands This article provides a checklist for the vascular plant flora of the three contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in southwestern Arizona—the heart of the Sonoran Desert (Figure 1). These three entities encompass 514,242 hectares (1,270,700 acres), approximately 5141 km 2 (1985 mi 2). This listing includes the modern flora documented by botanists as well as the fossil record based on specimens collected and curated by packrats (Neotoma sp.). The modern flora includes at least 741 Felger, Rutman, Malusa, and Van Devender: Flora of southwestern Arizona: Checklist 2 Figure 1. Map of the flora area in southwestern Arizona. Map created by Ami Pate of Organ Pipe Cactus National Monument. Felger, Rutman, Malusa, and Van Devender: Flora of southwestern Arizona: Checklist 3 native and non-native taxa and is specimen-based. The fossil record includes more than 219 species documented by specimens recovered from packrat ( Neotoma spp.) middens spanning the last 43,000+ years (43,000 ybp to modern times). Van Devender sampled and studied numerous middens across the flora area at 240–975 m (787–3200 ft) elevation (see Felger et al. 2012a, 2013). Following the full checklist of the three protected areas is a checklist of approximately 135 taxa restricted to the Ajo Mountains and other higher mountains in Organ Pipe, most of which are essentially desert sky island populations. Synonyms are provided and cross-indexed only for taxonomic changes not shown in the more detailed checklist of the modern flora of the area published in Canotia (Felger et al. 2012b), and additional taxonomic updates can be expected in forthcoming floristic treatments of our flora. Family designations follow APG III. Non-native plants established as reproducing populations in the flora area are indicated with an asterisk (*) and non-native species not established as reproducing populations are marked with two asterisks (**). Present-day taxa also known from the fossil record are indicated with a dagger symbol (†), and those no longer present in the flora area are indicated with two daggers (††). Some fossils not identifiable to species are shown with dagger symbols and a question mark (††?); these include ones identifiable only to genus, or a species group, or one of two species, and may be the same as modern taxa or ones no longer present in the flora area. These same symbols will be used throughout forthcoming contributions to our flora of the three protected areas in southwestern Arizona. The individual taxonomic complexities including the fossil specimens will be discussed and interpreted in the species accounts in forthcoming contributions. This article is the second contribution for our flora in southwestern Arizona (Felger et al. 2013). The first article in this series includes maps and brief descriptions of the physical, biological, ecologic, floristic, and deep history makeup of the flora area. Considerable additional background information can be found in web sites for Organ Pipe and Cabeza Prieta, e.g., Organ Pipe Cactus National Monument (2011) and Slone (2011). This flora will be published in segments in forthcoming articles in Phytoneuron and will also be posted open access on the website of the University of Arizona Herbarium (ARIZ). MODERN AND FOSSIL TAXA IN ORGAN PIPE CACTUS NATIONAL MONUMENT, CABEZA PRIETA NATIONAL WILDLIFE REFUGE, AND THE TINAJAS ALTAS REGION PTERIDOPHYTES MARSILEACEAE Marsilea vestita Hooker & Greville PTERIDACEAE Argyrochosma limitanea (Maxon) Windham subsp. limitanea Astrolepis cochisensis (Goodding) D.M. Benham & Windham Astrolepis sinuata (Lagasca ex Swartz) D.M. Benham & Windham subsp. sinuata Bommeria hispida (Mettenius ex Kuhn) Underwood Cheilanthes lindheimeri Hooker Cheilanthes parryi (D.C. Eaton) Domin Cheilanthes villosa Davenport ex Maxon Cheilanthes wrightii Hooker Cheilanthes yavapensis T. Reeves ex Windham Notholaena californica D.C. Eaton subsp. californica Notholaena standleyi Maxon Felger, Rutman, Malusa, and Van Devender: Flora of southwestern Arizona: Checklist 4 Pellaea truncata Goodding Pentagramma triangularis (Kaulfuss) Yatskievych et al. var. maxonii (Weatherby) Yatskievych et al. LYCOPODS SELAGINELLACEAE †Selaginella arizonica Maxon Selaginella eremophila Maxon GYMNOSPERMS CUPRESSACEAE Juniperus arizonica R.P. Adams ††Juniperus californica Carrière ††Juniperus cf. osteosperma (Torrey) Little ††Juniperus scopulorum Sargent EPHEDRACEAE †Ephedra aspera Engelmann ex S. Watson [E. fasciculata A. Nelson] PINACEAE ††Pinus edulis Engelmann var. fallax Little MAGNOLIIDS ARISTOLOCHIACEAE Aristolochia watsonii Wooton & Standley SAURURACEAE Anemopsis californica (Nuttall) Hooker & Arnott EUDICOTS ACANTHACEAE Anisacanthus thurberi (Torrey) A. Gray Carlowrightia arizonica A. Gray Dicliptera resupinata (Vahl) de Jussieu Justicia californica (Bentham) D.N. Gibson †Justicia candicans (Nees) L.D. Benson Justicia longii Hilsenbeck Ruellia nudiflora (Engelmann & A. Gray) Urban ADOXACEAE **Sambucus cerulea Rafinesque AIZOACEAE *Mesembryanthemum crystallinum Linnaeus *Mesembryanthemum nodiflorum Linnaeus Trianthema portulacastrum Linnaeus Felger, Rutman, Malusa, and Van Devender: Flora of southwestern Arizona: Checklist 5 AMARANTHACEAE (includes Chenopodiaceae) *Amaranthus albus Linnaeus Amaranthus crassipes Schlechtendahl var. crassipes †Amaranthus fimbriatus (Torrey) Bentham ex S. Watson †Amaranthus palmeri S. Watson Amaranthus ×tucsonensis Henrickson ††?Amaranthus sp./spp. †Atriplex canescens (Pursh) Nuttall subsp. canescens ††Atriplex confertifolia (Torrey & Frémont) S. Watson †Atriplex elegans (Moquin-Tandon) D. Dietrich Atriplex lentiformis (Torrey) S. Watson subsp. lentiformis Atriplex linearis S. Watson Atriplex pacifica A. Nelson †Atriplex polycarpa (Torrey) S. Watson **Bassia hyssopifolia (Pallas) Kuntze *Chenopodium murale Linnaeus Chenopodium watsonii A. Nelson ††?Froelichia sp. Gomphrena sonorae Torrey Monolepis nuttalliana (Schultes) Greene Nitrophila occidentalis (Moquin-Tandon) S. Watson *Salsola tragus Linnaeus Suaeda nigra (Rafinesque) J.F. Macbride Tidestromia lanuginosa (Nuttall) Standley subsp. eliassoniana Sánchez-del Pino & Flores Olvera ANACARDIACEAE †Rhus aromatica Aiton var. trilobata (Nuttall) A. Gray ex S. Watson ††Rhus cf. aromatica Rhus kearneyi F.A. Barkley subsp. kearneyi APIACEAE Bowlesia incana Ruiz & Pavón †Daucus pusillus Michaux Eryngium nasturtiifolium de Jussieu ex F. Delaroche Lomatium nevadensis (S. Watson) Coulter & Rose Spermolepis lateriflora G.L. Nesom [S. echinata (Nuttall) A. Heller, in part] Yabea microcarpa (Hooker & Arnott) Koso-Poljanski APOCYNACEAE (includes Asclepiadaceae) †Asclepias albicans S. Watson Asclepias erosa Torrey Asclepias linaria Cavanilles Asclepias nyctaginifolia A. Gray Asclepias subulata Decaisne Funastrum hartwegii (Vail) Schlechter Haplophyton cimicidum A. de Candolle Matelea cordifolia Woodson Matelea parvifolia (Torrey) Woodson Metastelma arizonicum A. Gray Felger, Rutman, Malusa, and Van Devender: Flora of southwestern Arizona: Checklist 6 ASTERACEAE Acamptopappus sphaerocephalus (Harvey & A. Gray) A. Gray var. sphaerocephalus Acourtia nana (A. Gray) Reveal & R.M. King Acourtia wrightii (A. Gray) Reveal & R.M. King Adenophyllum porophylloides (A. Gray) Strother Ageratina paupercula (A. Gray) R.M. King & H. Robinson Ambrosia ambrosioides (Cavanilles) W.W. Payne †Ambrosia confertiflora de Candolle Ambrosia cordifolia (A. Gray) W.W. Payne †Ambrosia deltoidea (Torrey) W.W. Payne †Ambrosia dumosa (A. Gray) W.W. Payne Ambrosia dumosa × A. ilicifolia †Ambrosia ilicifolia (A. Gray) W.W. Payne Ambrosia monogyra (Torrey & A. Gray ex A. Gray) Strother & B.G. Baldwin †Ambrosia salsola (Torrey & A. Gray) Strother & B.G. Baldwin var. pentalepis (Rydberg) Strother & B.G. Baldwin Arida arizonica,
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